Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

CCNY, Rice University researchers develop low-cost, 'green' way to make antimicrobial paints

24.01.2008
Findings to Be Published in March Nature Materials

Researchers at The City College of New York (CCNY) and Rice University have developed a low-cost, environmentally friendly technique for embedding antimicrobial silver nanoparticles into vegetable oil-based paints. The method, to be reported in the March issue (online January 20) of Nature Materials, could give homes and workplaces a new defense against germs by applying a fresh coat of paint.

Silver’s antibacterial properties have been known for thousands of years, and silver nanoparticles offer superior antibacterial activity while being non-toxic. However, coatings containing antimicrobial agents have failed commercially in the past due to their complex, multi-step preparation methods and high cost of production.

The CCNY/Rice team developed a “green chemistry” approach to synthesize metal nanoparticles in common household paints in situ without using hazardous reagents and solvents. “We extensively worked on poly-unsaturated hydrocarbon chain containing polymers/oils to devise a novel approach to nanoparticle formation” said Dr. George John, Professor of Chemistry at CCNY and lead author of the article.

Polyunsaturated hydrocarbons undergo auto-oxidation-induced cross-linking, which is similar to lipid peroxidation, the process by which fatty acids are oxidized in biological systems. During this process a variety of chemically active species called ‘free radicals’ are generated. These were used by the group as a tool to prepare metal nano-particles in situ in the oil medium.

“The simplicity of the process and economics should allow us to commercialize these paints as a versatile coating material for health and environmental applications” says Dr. Pulickel M. Ajayan, Professor of Mechanical Engineering and Materials Science at Houston-based Rice University, and co-author.

“Using the same approach we should be able to produce a large variety of nano-particle dispersions useful in applications ranging from healthcare to catalysis,” added co-investigator Dr. Ashavani Kumar, a postdoctoral research associate at Rice.

The nanoparticle embedded coating can be applied like traditional paints to such surfaces as metal, wood, polymers, glass, and ceramics. The metal nanoparticles show characteristic color but avoid the use of short shelf-life organic pigment paints.

In addition, these coatings exhibited efficient antibacterial activity toward Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). The antibacterial property is important for hospitals and other public buildings that are prone to bacterial growth, a main cause of infection and disease.

“We have been working on developing various in situ methods for organic soft matter-mediated metal nanoparticle synthesis,” noted Dr. Praveen Kumar Vemula, one of the investigators. “However, to date, the present approach is the smartest as it is devised based on utilization of naturally occurring process.”

About The City College of New York

For 160 years, The City College of New York has provided low-cost, high-quality education for New Yorkers in a wide variety of disciplines. Over 14,000 students pursue undergraduate and graduate degrees in the College of Liberal Arts and Sciences, the School of Architecture, the School of Education, the Grove School of Engineering and the Sophie Davis School of Biomedical Education. For additional information, go to http://www.ccny.cuny.edu.

About Rice University

Rice University is consistently ranked one of America’s best teaching and research universities. It is distinguished by its: size—2,850 undergraduates and 1,950 graduate students; selectivity—10 applicants for each place in the freshman class; resources—an undergraduate student-to-faculty ratio of 6-to-1, and the fifth largest endowment per student among American universities; residential college system, which builds communities that are both close-knit and diverse; and collaborative culture, which crosses disciplines, integrates teaching and research, and intermingles undergraduate and graduate work. Rice’s wooded campus is located in the nation’s fourth largest city and on America’s South Coast.

Ellis Simon | EurekAlert!
Further information:
http://www.ccny.cuny.edu
http://www.rice.edu

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Spider silk key to new bone-fixing composite

University of Connecticut researchers have created a biodegradable composite made of silk fibers that can be used to repair broken load-bearing bones without the complications sometimes presented by other materials.

Repairing major load-bearing bones such as those in the leg can be a long and uncomfortable process.

Im Focus: Writing and deleting magnets with lasers

Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.

Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...

Im Focus: Gamma-ray flashes from plasma filaments

Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.

The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...

Im Focus: Basel researchers succeed in cultivating cartilage from stem cells

Stable joint cartilage can be produced from adult stem cells originating from bone marrow. This is made possible by inducing specific molecular processes occurring during embryonic cartilage formation, as researchers from the University and University Hospital of Basel report in the scientific journal PNAS.

Certain mesenchymal stem/stromal cells from the bone marrow of adults are considered extremely promising for skeletal tissue regeneration. These adult stem...

Im Focus: Like a wedge in a hinge

Researchers lay groundwork to tailor drugs for new targets in cancer therapy

In the fight against cancer, scientists are developing new drugs to hit tumor cells at so far unused weak points. Such a “sore spot” is the protein complex...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

IWOLIA: A conference bringing together German Industrie 4.0 and French Industrie du Futur

09.04.2018 | Event News

 
Latest News

Magnetic nano-imaging on a table top

20.04.2018 | Physics and Astronomy

Start of work for the world's largest electric truck

20.04.2018 | Interdisciplinary Research

Atoms may hum a tune from grand cosmic symphony

20.04.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>